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/**
* @file main.c
* Entry point for operating system
*
* Copyright (C) 2018 Clyne Sullivan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <clock.h>
#include <gpio.h>
#include <priv_gpio.h>
#include <heap.h>
#include <stm32l476xx.h>
#include <task.h>
extern uint8_t __bss_end__;
void kmain(void);
int main(void)
{
asm("cpsid i");
// disable cached writes for precise debug info
//*((uint32_t *)0xE000E008) |= 2;
// prepare flash latency for 80MHz operation
FLASH->ACR &= ~(FLASH_ACR_LATENCY);
FLASH->ACR |= FLASH_ACR_LATENCY_4WS;
// init core components
clock_init();
heap_init(&__bss_end__);
gpio_init();
// enable FPU
//SCB->CPACR |= (0xF << 20);
task_init(kmain);
while (1);
}
void task2(void);
void kmain(void)
{
gpio(GPIO_MODE, 5, OUTPUT);
task_start(task2, 512);
for (int i = 0; i < 8; i++) {
gpio(GPIO_OUT, 5, !(i & 1));
delay(200);
}
}
void task3(void);
void task2(void)
{
delay(400);
task_start(task3, 1024);
}
void task3(void)
{
int state = 0;
delay(2500);
while (1) {
gpio(GPIO_OUT, 5, state ^= 1);
delay(500);
}
}
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